Participants respond to the target stimulus faster in a visual search task when the target item âpops outâ among distractor stimuli. Priming of pop-out refers to cases in which repetition of the pop-out feature (e.g., color) from the previous trials further speeds up visual search. Previous attempts at characterizing the memory representations underlying priming of pop-out put forward a specialized memory system evolved to benefit from the repetition of pop-out feature and location of stimuli in the environment (Maljkovic & Nakayama, 1994, 1996). In this dissertation, I primarily used behavioral measures (e.g., reaction time, RT) and event-related potentials (ERPs) (e.g., P3b) associated with working and long-term memory to demonstrate that priming of pop-out could be explained by these canonical memory systems. The results suggest that working memory representations guide attention and this guidance is modulated by the number of distractors. However, sequential repetitions of the pop-out feature modulate both long-term memory and working memory representations and these representations are strategically employed in guidance of attention. Further, repetition of target locations does not modulate either working or long-term memory representations; therefore different memory systems are employed for priming of the pop-out feature and location. Taken together, these results suggest that canonical memory systems, such as working memory and long-term memory, could explain priming of pop-out in particular and memory effects from previous trials that could permeate through the current trial in other visual search tasks in general.
| Identifer | oai:union.ndltd.org:VANDERBILT/oai:VANDERBILTETD:etd-05162016-134207 |
| Date | 19 May 2016 |
| Creators | Bilge, Mustafa Taha |
| Contributors | Geoffrey F. Woodman, Sean M. Polyn, Daniel T. Levin, Gordon D. Logan |
| Publisher | VANDERBILT |
| Source Sets | Vanderbilt University Theses |
| Language | English |
| Detected Language | English |
| Type | text |
| Format | application/pdf |
| Source | http://etd.library.vanderbilt.edu/available/etd-05162016-134207/ |
| Rights | restricted, I hereby certify that, if appropriate, I have obtained and attached hereto a written permission statement from the owner(s) of each third party copyrighted matter to be included in my thesis, dissertation, or project report, allowing distribution as specified below. I certify that the version I submitted is the same as that approved by my advisory committee. I hereby grant to Vanderbilt University or its agents the non-exclusive license to archive and make accessible, under the conditions specified below, my thesis, dissertation, or project report in whole or in part in all forms of media, now or hereafter known. I retain all other ownership rights to the copyright of the thesis, dissertation or project report. I also retain the right to use in future works (such as articles or books) all or part of this thesis, dissertation, or project report. |
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